"He hit my hands away. He's strong, so when he grabs you, your
jersey or whatever, and you try to defend yourself and rebound.
So maybe you can do some move, not to hurt, (but) just to get
good position. But then something happens where you get hurt in
the paint. It's not anything where I want to try to hurt him. I'm
not that kind of person. I just try to play hard, and that's it."

So Ibaka is saying that he intentionally retaliated, but
unintentionally hit him in the groin.

Based on that explanation, he probably still should have been
ejected — even if it was an accident that the punch landed where
it did, he threw it purposefully.